Grundfos NBE - Servicing the Product

9. Servicing the product
Never stand on the CUE, motor and the pump.
CAUTION
Electric shock
Minor or moderate personal injury
‐ Before starting any work on the product, make sure
that the power supply has been switched off and that it
cannot be accidentally switched on. See section
Installation requirements.
‐ Touching the electrical parts may be fatal, even after
CUE has been switched off.
WARNING
Electric shock
Death or serious personal injury
‐ Before carrying out any work, ensure that the motor is
not rotating. Even when not supplied with power, there
is voltage at the terminals of a rotating magnet-
assisted reluctance motor.
Voltage Min. waiting time
4 minutes 15 minutes 20 minutes
200-240 V
0.75 - 3.7 kW
(1 - 5 hp)
5.5 - 45 kW
(7.5 - 60 hp)
380-500 V
0.55 - 7.5 kW
(0.75 - 10 hp)
11 - 90 kW
(15 - 125 hp)
110 - 250 kW
(150 - 350 hp)
525-600 V
0.75 - 7.5 kW
(1 - 10 hp)
11 - 90 kW
(15 - 125 hp)
525-690 V
11 - 250 kW
(15 - 350 hp)
DANGER
Magnetic field
Death or serious personal injury
‐ Do not dismantle, assemble or maintain the motor if
you have a pacemaker or any other implanted
electronic device.
‐ Keep the working environment clean, make sure no
magnetized dust exist.
DANGER
Intoxication or risk of chemical burn
Death or serious personal injury
‐ The battery can cause severe or fatal injuries in 2
hours or less if it is swallowed or placed inside any
part of the body. In such event, seek medical attention
immediately.
• The replacement or servicing of batteries must be
carried out by a qualified person.
• The battery contained within this product, whether new
or used, is hazardous and is to be kept away from
children.
Conduct a functional test every 12 months to detect any failure or
malfunction of the STO functionality.
To conduct the functional test, perform the following steps:
• Remove the 24 V DC voltage supply at terminal 37.
• Check if the operating panel displays the alarm "Safe Stop
A68".
• Verify that the frequency converter trips the unit.
• Verify that the motor is coasting and comes to a complete stop.
• Verify that the motor cannot be started.
• Reconnect the 24 V DC voltage supply to terminal 37.
• Verify that the motor is not started automatically and restarts
only by giving a reset signal (via bus, Digital I/O, or the [Reset]
button).
Related information
4. Installation requirements
22
English (US)